公开(公告)号：US09341412B2

公开(公告)日：2016-05-17

申请号：US13717773

申请日：2012-12-18

Applicant: GENERAL ELECTRIC COMPANY

Inventor： Krishan Lal Luthra

IPC: F01D5/28 ,  F02C6/08 ,  F02C7/18 ,  F26B23/02 ,  F23R3/00 ,  C04B41/00 ,  C04B41/45 ,  C04B41/80

CPC classification number: F26B23/02 ,  C04B41/009 ,  C04B41/4519 ,  C04B41/80 ,  F01D5/28 ,  F01D5/288 ,  F02C6/08 ,  F02C7/18 ,  F23R3/007 ,  C04B35/565 ,  C04B35/806 ,  C04B35/584 ,  C04B35/58085

Abstract: The present disclosure relates to methods and systems for reducing silica recession of silicon-containing ceramics or silicon-containing ceramic composites, particularly those exposed to a combustion gas or to combustion gas environments, including those exposed to high temperature combustion gas environments. The methods and systems involve silicon-doping of compressed air and/or removal of moisture from compressed air prior to co-mingling the treated compressed air with the combustion gas to which the silicon-containing ceramics or silicon-containing ceramic composites are exposed.

Abstract translation: 本公开内容涉及用于减少含硅陶瓷或含硅陶瓷复合材料的二氧化硅凹陷的方法和系统，特别是暴露于燃烧气体或燃烧气体环境中的那些，包括暴露于高温燃烧气体环境的那些。 在将经处理的压缩空气与含硅陶瓷或含硅陶瓷复合材料暴露于其中的燃烧气体共混之前，该方法和系统涉及压缩空气的硅掺杂和/或从压缩空气中去除水分。

公开(公告)号：US20230090598A1

公开(公告)日：2023-03-23

申请号：US17994459

申请日：2022-11-28

Applicant: General Electric Company

Inventor： Krishan Lal Luthra ,  Julin Wan ,  Reza Sarrafi-Nour

IPC: F01D5/28 ,  C23C4/04 ,  C04B41/89 ,  C04B41/00 ,  C04B41/52 ,  C04B41/50 ,  C04B41/85

Abstract: An article for high temperature service is presented herein. One embodiment is an article including a substrate having a silicon-bearing ceramic matrix composite; and a layer disposed over the substrate, wherein the layer includes silicon and a dopant, the dopant including aluminum. In another embodiment, the article includes a ceramic matrix composite substrate, wherein the composite includes a silicon-bearing ceramic and a dopant, the dopant including aluminum; a bond coat disposed over the substrate, where the bond coat includes elemental silicon, a silicon alloy, a silicide, or combinations including any of the aforementioned; and a coating disposed over the bond coat, the coating including a silicate (such as an aluminosilicate or rare earth silicate), yttria-stabilized zirconia, or a combination including any of the aforementioned.

公开(公告)号：US11479515B2

公开(公告)日：2022-10-25

申请号：US16229429

申请日：2018-12-21

Applicant: General Electric Company

Inventor： Krishan Lal Luthra ,  Julin Wan

IPC: C04B41/89 ,  C04B41/00 ,  C04B41/50 ,  C04B41/52 ,  C04B41/87

Abstract: A coated component, along with methods of its formation and use, is provided. The coated component includes a ceramic matrix composite (CMC) substrate comprising silicon carbide and having a mullite bondcoat on its surface. The mullite bondcoat includes an oxygen getter phase contained within a mullite phase. For example, the mullite bondcoat may include 60% to 98% by volume of the mullite phase. An environmental barrier coating is on the mullite bondcoat.

公开(公告)号：US11072565B2

公开(公告)日：2021-07-27

申请号：US14633422

申请日：2015-02-27

Applicant: GENERAL ELECTRIC COMPANY

Inventor： Jared Hogg Weaver ,  Gregory Scot Corman ,  Krishan Lal Luthra

IPC: C04B37/00 ,  C04B35/628 ,  C04B35/80 ,  C04B35/71 ,  C23C16/04

Abstract: According to a method set forth herein a plurality of preform plies having first and second preform plies can be associated together to define a preform. The preform can be subject to chemical vapor infiltration (CVI) processing to define a ceramic matrix composite (CMC) structure.

公开(公告)号：US20210114944A1

公开(公告)日：2021-04-22

申请号：US16655626

申请日：2019-10-17

Applicant: General Electric Company

Inventor： Krishan Lal Luthra ,  Glen Harold Kirby ,  Julin Wan ,  Larry Steven Rosenzweig

IPC: C04B41/00 ,  C04B35/80 ,  C04B41/52 ,  C04B41/50

Abstract: Coated components, along with methods of their formation, are provided. The coated component includes a ceramic substrate having a surface; an intermediate layer on the surface of the ceramic substrate; and an environmental barrier coating on the intermediate layer. The intermediate layer includes a carbon-sink material that inhibits accumulation of free carbon from a carbon-containing species within the intermediate layer, the ceramic substrate, or both.

公开(公告)号：US10822998B2

公开(公告)日：2020-11-03

申请号：US14772883

申请日：2014-03-04

Applicant: General Electric Company

Inventor： Krishan Lal Luthra ,  Don M. Lipkin ,  Julin Wan

IPC: C04B35/565 ,  F01D25/00 ,  C04B41/89 ,  C04B41/00 ,  F01D5/28 ,  C04B41/52

Abstract: High-temperature machine components, more particularly, articles capable of operating in high-temperature environments, including for example turbines of gas engines, may be formed of a high temperature ceramic matrix composite that includes a ceramic substrate including silicon; an environmental harrier coating system including a silicon containing bond coat; and a diffusion barrier layer of a carbide or a nitride between the substrate of the article and the silicon bond coat of the environmental barrier coating system. The diffusion harrier layer selectively prevents or reduces the diffusion of boron and impurities from the substrate to the bond coat of the environmental barrier coating system.

公开(公告)号：US10280760B2

公开(公告)日：2019-05-07

申请号：US14870853

申请日：2015-09-30

Applicant: General Electric Company

Inventor： Narendra Digamber Joshi ,  Christian Lee Vandervort ,  Krishan Lal Luthra ,  Ronald Scott Bunker ,  Joel Meier Haynes ,  Venkat Eswarlu Tangirala

IPC: F02C1/00 ,  F02C3/34 ,  F02C1/08 ,  F01D5/18 ,  F23R3/00 ,  F02C6/00 ,  F02C7/18 ,  F23C9/08 ,  F01D25/32

Abstract: A turbine assembly is provided. The turbine assembly includes a gas turbine engine including at least one hot gas path component formed at least partially from a ceramic matrix composite material. The turbine assembly also includes a treatment system positioned to receive a flow of exhaust gas from the gas turbine engine. The treatment system is configured to remove water from the flow of exhaust gas to form a flow of treated exhaust gas, and to channel the flow of treated exhaust gas towards the at least one hot gas path component. The at least one hot gas path component includes a plurality of cooling holes for channeling the flow of treated exhaust gas therethrough, such that a protective film is formed over the at least one hot gas path component.

公开(公告)号：US20180354866A1

公开(公告)日：2018-12-13

申请号：US15988188

申请日：2018-05-24

Applicant: General Electric Company

Inventor： Krishan Lal Luthra

IPC: C04B41/52 ,  C04B41/00 ,  C04B41/50 ,  C04B35/78

CPC classification number: C04B41/52 ,  C04B35/78 ,  C04B41/009 ,  C04B41/5024 ,  C04B41/5025 ,  C04B41/5059 ,  C04B41/5066 ,  C04B41/5071 ,  C04B41/5089 ,  C04B41/5096

Abstract: An article comprises a substrate comprising a ceramic matrix composite; a first layer disposed over the substrate, the first layer comprising a substantially interconnected silicon source material, and a secondary material; and a second layer disposed over the first layer, the second layer comprising a membrane material in mass transfer communication with the silicon source material.

公开(公告)号：US09850174B2

公开(公告)日：2017-12-26

申请号：US15078124

申请日：2016-03-23

Applicant: GENERAL ELECTRIC COMPANY

Inventor： Gregory Scot Corman ,  Jared Hogg Weaver ,  Krishan Lal Luthra

IPC: C04B35/573 ,  C04B35/76 ,  C04B38/06 ,  F01D5/28 ,  F01D9/02

CPC classification number: C04B35/76 ,  C04B35/6267 ,  C04B35/80 ,  C04B35/806 ,  C04B38/06 ,  C04B2235/3826 ,  C04B2235/5244 ,  C04B2235/5268 ,  C04B2235/5481 ,  C04B2235/614 ,  C04B2235/616 ,  F01D5/282 ,  F01D9/02 ,  F05D2220/30 ,  F05D2230/314 ,  F05D2300/6033 ,  F05D2300/614

Abstract: Ceramic matrix composite articles include, for example, a plurality of unidirectional arrays of fiber tows in a matrix having a monomodal pore size distribution, and a fiber volume fraction between about 15 percent and about 35 percent. The articles may be formed by, for example, providing a shaped preform comprising a prepreg tape layup of unidirectional arrays of fiber tows, a matrix precursor, and a pore former, curing the shaped preform to pyrolyze the matrix precursor and burnout the pore former so that the shaped preform comprises the unidirectional arrays of fiber tows and a porous matrix having a monomodal pore size distribution, and subjecting the cured shaped preform to chemical vapor infiltration to densify the porous matrix so that the ceramic matrix composite article has a fiber volume fraction between about 15 percent and about 35 percent.

公开(公告)号：US20170089205A1

公开(公告)日：2017-03-30

申请号：US14870853

申请日：2015-09-30

Applicant: General Electric Company

Inventor： Narendra Digamber Joshi ,  Christian Lee Vandervort ,  Krishan Lal Luthra ,  Ronald Scott Bunker ,  Joel Meier Haynes ,  Venkat Eswarlu Tangirala

IPC: F01D5/18 ,  F02C6/18 ,  F01D25/08 ,  F01D9/02 ,  F23R3/00 ,  F02C3/04 ,  F02C7/14

CPC classification number: F01D5/186 ,  F01D25/32 ,  F02C3/34 ,  F02C6/003 ,  F02C7/185 ,  F05D2260/213 ,  F05D2260/61 ,  F05D2300/6033 ,  F23C9/08 ,  F23M2900/05004 ,  F23N2021/12 ,  F23R3/002 ,  F23R2900/03041 ,  F23R2900/03341 ,  Y02E20/14 ,  Y02E20/16

Abstract: A turbine assembly is provided. The turbine assembly includes a gas turbine engine including at least one hot gas path component formed at least partially from a ceramic matrix composite material. The turbine assembly also includes a treatment system positioned to receive a flow of exhaust gas from the gas turbine engine. The treatment system is configured to remove water from the flow of exhaust gas to form a flow of treated exhaust gas, and to channel the flow of treated exhaust gas towards the at least one hot gas path component. The at least one hot gas path component includes a plurality of cooling holes for channeling the flow of treated exhaust gas therethrough, such that a protective film is formed over the at least one hot gas path component.